8 letter words:
underfur12,
7 letter words:
unurged9,
6 letter words:
fugued11,
funder10,
furred10,
refund10,
gerund8,
nudger8,
5 letter words:
fudge10,
fugue9,
unfed9,
nudge7,
urged7,
nuder6,
ruder6,
under6,
undue6,
urger6,
rerun5,
4 letter words:
fend8,
feud8,
frug8,
fugu8,
fund8,
enuf7,
fern7,
dreg6,
drug6,
dung6,
gude6,
dune5,
dure5,
durn5,
durr5,
genu5,
grue5,
guru5,
nerd5,
nude5,
nurd5,
rend5,
rude5,
rued5,
rung5,
unde5,
urge5,
ruer4,
rune4,
3 letter words:
def7,
fed7,
fud7,
fug7,
fen6,
fer6,
feu6,
fun6,
fur6,
ref6,
dug5,
ged5,
den4,
due4,
dun4,
end4,
eng4,
erg4,
gen4,
gnu4,
gun4,
neg4,
red4,
reg4,
rug4,
urd4,
ern3,
err3,
rue3,
run3,
urn3,
2 letter words:
ef5,
fe5,
de3,
ed3,
en2,
er2,
ne2,
nu2,
re2,
un2,